Abstract : -Doing science- involves belonging to a community and consenting to the knowledge established by others ; but il also involves questionning it to better actualizing it.The article questions the dual relationship with authority that allows to build the investigative approach. The question of heliocentrism constitutes a striking example of the difficulty to emancipate oneself from the paradigmatic pressure of the dominant culture. A traditional astronomy sequence centered on purely physical skills appears ineffective to overcome the naive Copernicanism of participants. Its association with a sequence specifically designed to legitimize unusual viewpoints allows 30-50% of students to access the Galilean ie relativistic paradigm. The analysis and assessment of the evolution of the participants- relationship to authority show that, beyond its interest in science education, IBSE can be a powerful tool to become aware of the nature of the most established prejudices of the dominant culture, and therefore to emancipate oneself from them.